Particularly insidious, counterfeit medicines dupe sick people into believing they are taking something which will make them well, when it may instead make them sicker or even kill them.

特别阴险的是，假冒药物欺骗患者，使他们相信他们正在服用的东西将使他们康复，而实际上却可使他们病得更重甚至造成他们死亡。

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It's an insidious but frequent tendency to let the board decide, rather than advise or approve. It goes like this...

就是他们让董事会为他们做决定，而不是提供建议或赞同，这是个有害的且有频繁发生趋势的行为。

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The FCC has also weighed in, calling some placements "particularly insidious because viewers often are unaware that someone is trying to influence, persuade, or market to them."

美国联邦通信委员会对此类型是也持谨慎态度，他们认为一些植入“相当阴险，因为观众常常无法觉察到一些人正在试图影响、说服、并将产品推销给他们。”

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Or is there some insidious problem looming, causing havoc with our previously extremely reliable navigation tool - the compass?

BBC: Reverse polarity a risk to climbers, mountain body warns

Norovirus spreads easily via contaminated food or drinking water, but a more insidious route is from a person touching a surface contaminated with the residue of stool or vomit from an infected person and then touching his or her mouth before hand-washing.

FORBES: Magazine Article

Auditors too would be freed from the insidious pressure of selling or reviewing colleagues' work.

ECONOMIST: Accountancy